PCN CODING SYSTEM

• THE TYPE OF PAVEMENT:

R?RIGID, F ?FLEXIBLE

• THE SUBGRADE STRENGTH CATEGORY

A ?HIGH, B ?MED, C ?LOW, D ?ULTRA LOW

• THE TIRE PRESSURE CATEGORY

W ?HIGH(NO LIMIT), X ?MED (LIMITED TO 217 psi)

Y ?LOW(LIMITED TO 145 psi),Z ?VERY LOW (LIMITED TO 73 psi)

• EVALUATION METHOD

T ?TECHNICAL EVALUATION, U ?USING AIRCRAFT EXPERIENCE

EXAMPLE PCN 56/R/B/W/T

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